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Finding the Fourth Proportional to 755.30, 1,133.53 and 344.75

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Solution

The fourth proportional to 755.30, 1,133.53 and 344.75 is: 517.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.30 : 1,133.53 = 344.75 : x
  2. Step 2: Convert to fraction form
    755.30/1,133.53 = 344.75/x
  3. Step 3: Cross multiply
    755.30x = 1,133.53 × 344.75
  4. Step 4: Simplify right side
    755.30x = 390,777.94
  5. Step 5: Solve for x
    x = 390,777.94/755.30
  6. Step 6: Final answer
    x = 517.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.